This didn't work for me (this time...although it worked once before.)

I had no winupdates.exe file (or any other file using a lot of CPU).
Also: I can't even open my regedit (even using the method listed here), I get a message telling me that another program is using the regeditor.

Is there anything new I can do to sort this out? I don't want to lose LimeWire totally...